strigidaemon fail to start with error "could not create FSDirectory: Invalid directory"

[scrat1402]

When I type strigidaemon from the command line, I get the following message:

WARNING: field 'http://strigi.sf.net/ontologies/0.9#debugParseError' is not defined in any rdfs ontology database.
could not create FSDirectory: Invalid directory

And nothing happen, the daemon don't start to index.

My system is Ubuntu 9.04 but same message with 8.10

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/nepomukservicestub
NonfreeKernelModules: nvidia
Package: kdebase-runtime 4:4.2.2-0ubuntu1 [modified: usr/lib/kde4/libexec/kdesu]
ProcCmdline: /usr/bin/nepomukservicestub nepomukstrigiservice
ProcEnviron:
 LANGUAGE=fr_FR:fr:en_GB:en
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: kdebase-runtime
StacktraceTop:
 QThread::isRunning () from /usr/lib/libQtCore.so.4
 ?? () from /usr/lib/kde4/nepomukstrigiservice.so
 ?? () from /usr/lib/kde4/nepomukstrigiservice.so
 QObjectPrivate::deleteChildren ()
 QObject::~QObject () from /usr/lib/libQtCore.so.4
Title: nepomukservicestub crashed with SIGSEGV in QThread::isRunning()
Uname: Linux 2.6.28-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:QThread::isRunning (this=0x40) at thread/qthread.h:130
Nepomuk::IndexScheduler::stop (this=0x40)
~StrigiService (this=0x1f78010)
QObjectPrivate::deleteChildren (this=0x1fdd400)
~QObject (this=0x1fdaa40) at kernel/qobject.cpp:844

[Jonathan Thomas (echidnaman)]

The crash reported by apport is bug 317712